Mix and knead the dough

• Combine the flour, yeast, salt and cornstarch in the mixer bowl.
• Add the melted butter, eggs, avocado oil, milk and sugar, then mix with the dough hook.

Let the dough rise

• Cover the bowl and let the dough rise until doubled.

Make the cinnamon filling

• Combine the softened butter, brown sugar and cinnamon until a smooth paste forms.

Shape the babka

• Dust the work surface with flour and roll the risen dough into a large rectangle.
• Spread the filling over the dough and roll it up.
• Cut the roll in half lengthwise, flip both halves cut side up and twist them together, then join the ends to form a ring.

Second rise

• Place the ring in a parchment-lined cake pan and let it rise.

Make the sugar syrup

• Heat the water and granulated sugar in a saucepan over medium heat until slightly thickened.

Bake the babka

• Bake at 180 °C, rotating the pan halfway through so it bakes evenly.
• Brush the warm babka with the syrup, then let it cool before serving.